Material characterization and electrochemical performance of Sr(Ce&lt;sub&gt;0.6&lt;/sub&gt;Zr&lt;sub&gt;0.4&lt;/sub&gt;)&lt;sub&gt;0.8&lt;/sub&gt;Y&lt;sub&gt;0.2&lt;/sub&gt;O&lt;sub&gt;3&amp;minus;&amp;delta;&lt;/sub&gt; proton conducting ceramics prepared by EDTA-citrate complexing and solid-state reaction methods

Hung, I‐Ming; Chiang, Yen Juin; Lee, Sheng Wei; Chang, Jeng‐Kuei; Lin, Jiaping; Jang, J.S.C.; Li, Chuan; Hsi, Chi‐Shiung

doi:10.2109/jcersj2.123.187

Cited by 7 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sample SrZr 0.9 Y 0.1 O 3- δ (SZYO10) also contains a small amount of secondary phase SrY 2 O 4 indicating reducing the Y-doping level cannot eliminate it. The SrY 2 O 4 secondary phase was also observed in SZYO20 when synthesised by pulsed layer deposition method 30 and commonly exists in Y doped perovskite oxides such as Sr(Ce 0.6 Zr 0.4 ) 0.8 Y 0.2 O 3 31 and Sr(Ti 0.9 Y 0.1 )O 3 32 . A possible reason is, SrY 2 O 4 is a stable phase, which can be easily formed at a relatively low temperature before the formation of perovskite phase.…”

Section: Resultsmentioning

confidence: 91%

A fast ceramic mixed OH−/H+ ionic conductor for low temperature fuel cells

Zou,

Iuga,

Ling

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Low temperature ionic conducting materials such as OH− and H+ ionic conductors are important electrolytes for electrochemical devices. Here we show the discovery of mixed OH−/H+ conduction in ceramic materials. SrZr0.8Y0.2O3-δ exhibits a high ionic conductivity of approximately 0.01 S cm−1 at 90 °C in both water and wet air, which has been demonstrated by direct ammonia fuel cells. Neutron diffraction confirms the presence of OD bonds in the lattice of deuterated SrZr0.8Y0.2O3-δ. The OH− ionic conduction of CaZr0.8Y0.2O3-δ in water was demonstrated by electrolysis of both H218O and D2O. The ionic conductivity of CaZr0.8Y0.2O3-δ in 6 M KOH solution is around 0.1 S cm−1 at 90 °C, 100 times higher than that in pure water, indicating increased OH− ionic conductivity with a higher concentration of feed OH− ions. Density functional theory calculations suggest the diffusion of OH− ions relies on oxygen vacancies and temporarily formed hydrogen bonds. This opens a window to discovering new ceramic ionic conducting materials for near ambient temperature fuel cells, electrolysers and other electrochemical devices.

show abstract

Section: Resultsmentioning

confidence: 91%